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The figure below shows a conducting rod of negligible resistance that can slide on smooth U-shaped rail made of wire of resistance 2 Ω/m. The position of the conducting rod at t = 0 is shown. A time-dependent magnetic field B = 4t T is switched on at t = 0.
The current in the loop at t = 0 due to induced emf is
  • a)
    0.21 A, clockwise
  • b)
    0.42 A, clockwise
  • c)
    0.21 A, anticlockwise
  • d)
    zero
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
The figure below shows a conducting rod of negligible resistance that...
Induced current,
=
= 0.21 A
Using Lenz's law, the upper end of the rod is negative which makes the current flow clockwise.
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The figure below shows a conducting rod of negligible resistance that can slide on smooth U-shaped rail made of wire of resistance 2 Ω/m. The position of the conducting rod at t = 0 is shown. A time-dependent magnetic field B = 4t T is switched on at t = 0.The current in the loop at t = 0 due to induced emf isa)0.21 A, clockwiseb)0.42 A, clockwisec)0.21 A, anticlockwised)zeroCorrect answer is option 'A'. Can you explain this answer?
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